Rejang (baso Jang, baso Hejang) is an Austronesian language predominantly spoken by the Rejang people in southwestern parts of Sumatra (Bengkulu), Indonesia. There are five dialects, spread from mountainous region to the coastal region of Bengkulu, including the Musi (Musai) dialect, the Lebong dialect, the Kebanagung dialect, the Rawas (Awes) dialect, and the Pesisir dialect.

Rejang was written with the Rejang script for a long time.[4] The script is thought to pre-date the introduction of Islam to the area in the 12th century CE, although the earliest attested document has been dated to the mid 18th century. It is traditionally written on bamboo, buffalo horn, bark or copper plates. It was only recently that the Latin alphabet was introduced as a way of writing the language.

Rejang has five different dialects. Speakers of each dialects are able to communicate with one another, in spite of lexical and phonological differences. The five dialects of Rejangs are Musi (Musai), Lebong, Kebanagung, Rawas (Awes), and Pesisir. Among all dialects, Awes dialect is the hardest for other dialects speakers.